US-FAA14 CFR 121.595
Dispatching authority: Flag operations
Read the official ruleOfficial FAA regulation text (public domain)
(a) No person may start a flight unless an aircraft dispatcher specifically authorizes that flight. (b) No person may continue a flight from an intermediate airport without redispatch if the airplane has been on the ground more than six hours.
Verbatim text of a US Federal Aviation Regulation (public domain), reproduced for reference — not legal advice and not for navigation. A plain-English explainer may be added later; always rely on the current official rule linked above.